Fix startup issue for minimal config guidelines

With Boot 3.2.0 the auto-configured InMemoryUserDetailsManager bean (used by our minimal configuration) is backing-off because we include the spring-security-oauth2-resource-server dependency, and with an additional condition introduced since 3.2.2 - if none of the spring.security.user name or password properties is present in the setup.

With this update in the minimal configuration guidelines, the service is starting correctly.

Fixes gh-1475

docs/src/main/java/sample/gettingstarted/application.yml

@@ -7,6 +7,9 @@ logging:
 
 spring:
   security:
+    user:
+      name: user
+      password: password
     oauth2:
       authorizationserver:
         client: